Henry Margusity

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Maps for the Severe Weather And Snow Are Up

January 29, 2013; 9:35 AM ET

Video on the way


1. A very impressive warm, humid air mass ahead of the cold front today. Temps in the 70s and dew points in the 60s are more like late March or April. That fuel coupled with a 150-knot jet will mean severe storms for the area outlined on the maps below. We will probably see a very long squall line forming this afternoon, but it's the storms ahead of the squall line that may mean business in regards to tornado activity across Arkansas. Supercell storms may from this afternoon ahead of the initial squall line and the storms may produce large tornadoes.

2. My concern for tomorrow are the damaging wind gusts along the squall line. We should see a very long squall line from Pennsylvania to Georgia with wind gusts over 50 mph embedded along it. The more concentrated area of damaging wind gusts could be from southeastern Pennsylvania into Virginia where the 850mb jet is the strongest during the afternoon. That would include Philly to D.C. in the afternoon and evening as the squall line moves through. Behind the front, temps fall some 20-30 degrees and the reality of winter comes back.

3. I did post of the snow map for the snow behind the front in the Plains and Midwest later today into Wednesday. Looks like Wisconsin and Iowa will take the brunt of the snow with amounts over 4 inches.

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Henry Margusity
AccuWeather.com severe weather expert, Henry Margusity, offers the Meteorological Madness blog including detailed analysis of severe weather across the US.